You have to take a long break and just wait out the nausea, it’s rough but the only way. Then smoking less often, to avoid it happening again. I have chronic nausea (bc of a health thing) and when I smoke too much it gets worse on my breaks, so I have to limit my usage or I’ll be in the bathroom vomiting my whole t-break
Similar to the other responses, u need to just try to make urself get used to eating while sober again. Smthing some ppl do is they don’t eat all day n then eat a lot when they smoke in the evening, n instead you should try to eat throughout the day like #3 said to make it so ur body gets more used to eating when ur not high. U can start w easy foods like crackers and slowly make ur way toward bigger meals